dited Raytheon video (no sound!) of the 25 August 2009 first flight of the 74-metre tethered aerostat for the Joint Land Attack Cruise Missile Defense Elevated Netted Sensor (JLENS) system under development for the US Army. Each JLENS system will have two aerostats - one carrying a wide-area surveillance radar the other a fire-control radar - to detect and track low-lfying cruise missiles and direct surface-to-air missiles to over-the-horizon intercepts.

n the north of the British Isles,in Scotland,there's almost always a stiff breeze blowing.The Scottish government's ambitious plans call for about 50 percent of the country's electricity demand to come from renewable sources by 2020. Billions are being invested in an industry that promises lucrative returns. But not everyone is delighted.